A Berks County man pleaded guilty Tuesday to robbing four banks in a string of 11 holdups across six Pennsylvania counties, according to the U.S. Attorney's Office.

Boyertown, Pa., resident Marcus Akiem Ricketts, during a federal court hearing in Philadelphia, admitted to armed robberies at a Sovereign Bank in Pottstown, Pa., a Citizens Bank in Devon, Pa., a First Niagara Bank in Emmaus and an M&T Bank in Exton, Pa., authorities said. The 37-year-old used a firearm during the crimes, which occurred between June 8, 2010 and July 2, 2012, authorities said.

Ricketts faces 25 years in prison, including a mandatory seven-year term, five years of parole, a fine of up to $1.25 million, a $500 special assessment and restitution of approximately $194,436. His sentencing hearing is scheduled Sept. 17.

He previously pleaded guilty to seven other bank robberies in Berks, Bucks, Chester, Delaware, Lehigh and Montgomery counties, authorities said. Ricketts was charged with federal offenses in four of his 11 holdups.